October 15, (THEWILL) — The International Monetary Fund (IMF) has raised a fresh alarm about the trajectory of global public debt, projecting that aggregate government borrowing will exceed 100% of world GDP by 2029 — the highest level since the immediate post-World War II period.
The projection, published in the IMF’s latest Fiscal Monitor and Global Debt updates, underlines rising fiscal strain as many countries continue to run large deficits amid weak growth and elevated borrowing costs.
The top numbers
- The IMF’s Global Debt Database shows total world debt (public + private) remains very large — just above 235% of global GDP as of the latest update. Public debt alone is on a path to exceed 100% of GDP by 2029 under baseline projections.
- In a more severe but plausible scenario, the IMF warns there is a small but material tail risk: global public debt could reach 123% of GDP by 2029 (a 5% probability scenario), approaching the post-WWII peak of roughly 132%.
Why debt is rising again
The IMF says the upward drift in public debt reflects several forces:
- Large pandemic-era fiscal support that raised debt levels has not been fully unwound.
- Higher interest-rate burdens as central banks globally tightened policy to fight inflation; and
- Continued fiscal deficits in many countries amid weak revenue mobilisation and political resistance to tax increases.
These drivers have meant that, even as some nations stabilise primary balances, interest-payment obligations and structural deficits continue to push gross public debt higher.
Which countries and regions are most exposed?
Advanced economies already carry very high public-debt loads — and several are projected to stay above or climb above the 100% threshold. The IMF’s Fiscal Monitor highlights that major economies such as the United States, Japan and a number of European states remain the largest contributors to the global public-debt tally because of their large GDP weights and high debt ratios. China’s public debt ratio is also expected to rise, while many emerging and low-income countries face sharply higher borrowing costs and elevated debt-distress risks.
The IMF stresses an important distinction: advanced economies often have deeper domestic bond markets and greater scope to manage high debt, while emerging markets and low-income countries face tighter constraints — higher borrowing costs, weaker policy buffers and greater risk of outright debt distress. The global picture thus masks sharp country-level divergence in vulnerability.
Near-term implications for markets and policy
- The IMF’s message is blunt: policymakers must act now to restore fiscal buffers and make debt paths sustainable. Recommended measures include:
- Prioritising spending toward growth-enhancing public investment (infrastructure, health, education) while trimming non-targeted current expenditure;
- Improving revenue mobilisation (broader tax bases, more efficient collection) to reduce the deficit reliance on debt; and
- Strengthening debt-management frameworks and transparency to reduce refinancing risk and cost.
For financial markets, the IMF warns that rising debt — coupled with potential policy missteps or growth shortfalls — increases the risk of sovereign stress episodes, higher borrowing costs, and episodes of market volatility that could spill over across countries. Under the adverse scenario, the IMF models, sovereign spreads widen materially and debt-service burdens escalate, magnifying refinancing risks.
Debt restructuring and international support
The IMF notes that existing frameworks for sovereign debt restructuring remain slow and fragmented, posing a problem if more countries fall into distress. The Fund calls for improvements to the architecture for sovereign workouts — including faster, more predictable restructuring processes — to reduce contagion and loss of access to markets. It also stresses the continuing role of multilateral lenders and development finance to help lower-income countries smooth adjustment without choking off growth.
The IMF’s projections underscore a difficult fact for governments: raising revenue or cutting spending to stabilise debt often comes at short-term political cost. Yet delaying adjustment risks larger and more painful corrections later, including higher borrowing costs, reduced capacity for counter-cyclical support, and weaker investment. The Fund urges a middle path: gradual, credible consolidation paired with growth-friendly reallocation of spending.
Impact on Nigeria and other emerging markets
Although the IMF’s headline focus is global, the consequences are highly relevant for emerging markets:
- Higher global public debt raises the probability of tighter global financial conditions should markets reprice sovereign risk.
- Emerging markets that rely on foreign capital may face higher costs of capital and narrower policy space; and
- Countries with existing debt vulnerabilities could see refinancing windows shrink and sovereign risk premia rise.
For economies like Nigeria, which are pursuing fiscal consolidation amid inflationary pressures and foreign exchange challenges, the global trend reinforces the need for stronger domestic revenue efforts and careful debt management.
The IMF’s forecast that public debt will top 100% of global GDP by 2029 is a clear wake-up call. While the timing and magnitude differ across countries, the broad message is uniform: high and rising debt increases the likelihood of future fiscal stress. It constrains policymakers’ ability to respond to shocks. Governments that act early to secure credible consolidation paths, strengthen public finances, and target investment toward growth are best placed to navigate the risks ahead.
Ogochukwu Onwaeze
